2 Answers
2

--spider
When invoked with this option, Wget will behave as a Web spider,
which means that it will not download the pages, just check that
they are there. You can use it to check your bookmarks, e.g. with:
wget --spider --force-html -i bookmarks.html

GNU Wget is a free software package for retrieving files using HTTP, HTTPS and FTP. If you are not actually interested in retrieving files, you may be better off using a tool like cURL, which may have more fine-tuned support for what you want to do. (Using the --spider switch in Wget, for example, is an experimental hack according to the documentation.)